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Analog Devices Inc. AD7899BR-1REEL7
- Part No.:
- AD7899BR-1REEL7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 28-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
AD7899BR-1REEL7.pdf
- Description:
- IC ADC 14BIT SAR 28SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,664
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Product details
Overview
AD7899BR-1REEL7 from Analog Devices is a 14-bit, 400 kSPS successive-approximation ADC with integrated track/hold, 2.5 V reference, and high-speed parallel interface. It operates from a single 5 V supply, supports ±5 V and ±10 V bipolar input ranges, and delivers ±1.5 LSB INL max over –40°C to +85°C - used in precision data acquisition systems for industrial process control and automated test equipment.
For engineers reviewing the AD7899BR-1REEL7 datasheet, AD7899BR-1REEL7 pinout, AD7899BR-1REEL7 application, or AD7899BR-1REEL7 equivalent, key selection criteria include its 2.2 µs conversion time, 0.3 µs track/hold acquisition, internal/external clock flexibility, 3 V/5 V digital I/O compatibility via VDRIVE, and ±18 V analog overvoltage protection on VINA/VINB.
Technical Context
The AD7899BR-1REEL7 implements a laser-trimmed internal oscillator (enabling 400 kSPS throughput) or accepts external CLKIN up to 6.5 MHz for precise timing control. Its track/hold amplifier achieves 500 kHz –0.1 dB full-power bandwidth and 4.5 MHz –3 dB bandwidth, with aperture jitter of 25 ps typ and aperture delay of 20 ns max.
Conversion is initiated by CONVST rising edge, which places the track/hold into hold mode and triggers BUSY/EOC high; end-of-conversion is signaled by BUSY/EOC falling edge. Data is latched onto DB13–DB0 using CS and RD, supporting 3 V or 5 V logic levels via independent VDRIVE supply.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 14-bit - delivers 16,384 discrete output codes for high-fidelity signal digitization |
| Throughput Rate | 400 kSPS - enables real-time sampling of signals up to 200 kHz Nyquist frequency |
| Conversion Time | 2.2 µs max - defines minimum inter-conversion interval in high-speed acquisition |
| INL (Integral Nonlinearity) | ±1.5 LSB max - ensures monotonicity and <0.01% full-scale linearity error across temperature |
| Analog Input Ranges | ±5 V and ±10 V - selectable via external resistor configuration on VINA/VINB pins |
| Reference | Internal 2.5 V ±20 mV - buffered output at VREF pin; supports external 2.5 V ±5% override |
| Power Dissipation | 80 mW typ at 5 V - enables low-thermal-load operation in compact industrial modules |
Pinout & Package
AD7899BR-1REEL7 is housed in a 28-lead SOIC (R-28) package with standard JEDEC MS-013AC dimensions (17.9 mm × 7.5 mm × 2.3 mm), RoHS-compliant matte tin lead finish, and moisture sensitivity level 3.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VINA / VINB | Differential analog inputs | Support ±10 V (VINB = AGND) or ±5 V (VINA = VINB) configurations; ±18 V overvoltage tolerant |
| VREF | Reference I/O | Provides access to internal 2.5 V reference or accepts external 2.5 V ±5%; requires 0.1 µF decoupling |
| CONVST | Conversion start trigger | Rising-edge sensitive; initiates track/hold hold mode and starts conversion sequence |
| BUSY/EOC | Conversion status indicator | Active-high BUSY during conversion; transitions low at completion (EOC) when CONVST is low |
| DB13–DB0 | 14-bit parallel data bus | Three-state outputs; MSB-first natural binary coding (AD7899BR-1 uses two's complement) |
| VDRIVE | Digital I/O supply | Independent 3 V or 5 V rail enabling direct interfacing to 3 V microcontrollers without level shifters |
| STBY | Power-down control | Active-low input reducing current to 20 µA typ; enables rapid wake-up (<5 µs) for burst-mode acquisition |
Key Features
| Feature | Design Value |
|---|---|
| Single-supply 5 V operation | Eliminates need for dual ±15 V rails in legacy industrial DAQ systems, simplifying power design |
| 0.3 µs track/hold acquisition time | Enables consecutive conversions with minimal dead time, sustaining full 400 kSPS throughput |
| Overvoltage protection (±18 V) | Prevents latch-up or damage during sensor transients or wiring faults in field-deployed equipment |
| Internal/external clock selection | CLKIN pin state at CONVST edge selects between trimmed oscillator (ease of use) or external clock (timing sync) |
| 3 V/5 V logic compatibility | VDRIVE pin allows coexistence with mixed-voltage systems-no external translators required |
Applications
| Industrial Process Monitoring | Automated Test Equipment (ATE) |
|---|---|
|
Use Scenario: Continuous voltage/current monitoring of PLC analog I/O modules under varying load and temperature conditions. IC Role / Device Role / Timing Role: Primary ADC digitizing ±10 V sensor outputs (e.g., strain gauges, RTD bridges) with synchronized sampling across multiple channels. Use Value: ±1.5 LSB INL and 78 dB SNR ensure measurement repeatability within 0.02% of full scale across –40°C to +85°C operating range. |
Use Scenario: High-speed stimulus-response testing of analog circuits using programmable waveform generation and capture. IC Role / Device Role / Timing Role: Precision digitizer capturing transient responses (e.g., op-amp settling, filter step response) at up to 400 kSPS. Use Value: 2.2 µs conversion time and 0.3 µs acquisition enable sub-microsecond timing resolution without pipeline latency. |
| Power Quality Analyzers | Motor Drive Current Sensing |
|
Use Scenario: Simultaneous sampling of three-phase AC voltages and currents to compute harmonics, THD, and RMS values per IEEE 519. IC Role / Device Role / Timing Role: Synchronized multi-channel acquisition node with shared CONVST triggering and matched aperture jitter (25 ps typ). Use Value: –84 dB THD and –86 dB spurious noise support accurate 50th harmonic analysis (2.5 kHz @ 50 Hz fundamental). |
Use Scenario: Isolated phase-current feedback in servo drives, where fast overcurrent detection (<5 µs response) prevents IGBT failure. IC Role / Device Role / Timing Role: Real-time current digitization with STBY-controlled burst sampling during fault events. Use Value: Standby current of 20 µA typ and wake-up time <5 µs allow ultra-low-power standby while preserving rapid fault response. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 14-bit SAR ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD7899AR-1 | ±2 LSB INL (vs. ±1.5 LSB), same package and pinout | Suitable for cost-sensitive industrial controls where 0.01% linearity margin is acceptable | Select AD7899AR-1 if full-temperature INL spec relaxation is permissible and B-grade qualification is sufficient. |
| AD7682BCPZ-RL7 | 16-bit, 250 kSPS, SPI interface, no internal reference; requires external REF | Better resolution but lower speed and serial interface - suited for low-pin-count, high-accuracy sensor nodes | Choose AD7682BCPZ-RL7 when resolution >14-bit is critical and system architecture favors SPI over parallel bus. |
Compared with AD7899AR-1, AD7899BR-1 offers tighter INL for metrology-grade accuracy; compared with AD7682BCPZ-RL7, it provides higher throughput and integrated reference at the expense of resolution and interface flexibility.
Availability
AD7899BR-1REEL7 is available at Aetrix Electronics and suitable for industrial process monitoring, automated test equipment, power quality analyzers, and motor drive current sensing requiring stable component supply across extended temperature and long production lifecycles.
Supply support for AD7899BR-1REEL7 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Analog Devices, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, headquartered in Norwood, MA.
The AD7899 product line delivers high-speed, low-power 14-bit SAR ADCs with integrated references and flexible I/O for precision data acquisition in harsh industrial and test environments.
FAQ
What input voltage ranges does the AD7899BR-1REEL7 support?
The AD7899BR-1REEL7 supports ±5 V and ±10 V bipolar input ranges. Configuration is achieved externally: for ±10 V, VINB is tied to AGND and signal applied to VINA; for ±5 V, VINA and VINB are shorted and signal applied to both. The part maintains ±1.5 LSB INL across –40°C to +85°C for both ranges.
How does the AD7899BR-1REEL7 handle clocking - internal vs. external?
The AD7899BR-1REEL7 selects clock source based on CLKIN state at the rising edge of CONVST: low enables the internal laser-trimmed oscillator (guaranteeing 400 kSPS); high enables external CLKIN (up to 6.5 MHz). Each conversion requires 16 clock cycles, and external clock duty cycle must not exceed 60/40.
What is the function of the VDRIVE pin on the AD7899BR-1REEL7?
VDRIVE supplies power to the digital I/O buffers (DB13–DB0, BUSY/EOC, RD, CS, CONVST, CLKIN, STBY). It may be tied to 5 V for standard TTL/CMOS compatibility or to 3 V ±10% to interface directly with 3 V microcontrollers - eliminating level-shifter components in mixed-voltage systems.
Does the AD7899BR-1REEL7 include overvoltage protection, and what are its limits?
Yes, the AD7899BR-1REEL7 provides robust analog input overvoltage protection: ±18 V for ±10 V range, –9 V to +18 V for ±5 V range. This protects against transients, miswiring, or sensor faults without latch-up or permanent damage, a critical feature for field-deployed industrial instrumentation.
What is the significance of the "BR" grade in AD7899BR-1REEL7?
The "BR" grade denotes Analog Devices' industrial temperature grade (–40°C to +85°C) with enhanced linearity performance: ±1.5 LSB maximum INL (vs. ±2 LSB for "AR" grade). This tighter specification ensures higher measurement fidelity in demanding applications like calibration equipment and high-end ATE.
AD7899BR-1REEL7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 28-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Number of Bits:
- 14
- Sampling Rate (Per Second):
- 400k
- Number of Inputs:
- 1
- Input Type:
- Single Ended
- Data Interface:
- Parallel
- Configuration:
- S/H-ADC
- Ratio - S/H:ADC:
- 1:1
- Number of A/D Converters:
- 1
- Architecture:
- SAR
- Reference Type:
- External, Internal
- Voltage - Supply, Analog:
- 5V
- Voltage - Supply, Digital:
- 5V
- Features:
- -
- Operating Temperature:
- -40°C ~ 85°C
- Supplier Device Package:
- 28-SOIC
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
AD7899BR-1REEL7 FAQ
1.How can I place an order for AD7899BR-1REEL7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AD7899BR-1REEL7 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for AD7899BR-1REEL7 reliable?
The price and inventory of AD7899BR-1REEL7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD7899BR-1REEL7 is usually 5 days.
3.What payment methods are accepted for AD7899BR-1REEL7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD7899BR-1REEL7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD7899BR-1REEL7?
AD7899BR-1REEL7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD7899BR-1REEL7 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for AD7899BR-1REEL7?
For technical support, including AD7899BR-1REEL7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD7899BR-1REEL7 requirements.
6.How does Aetrix verify that AD7899BR-1REEL7 is sourced from the original manufacturer or authorized distributors?
All AD7899BR-1REEL7 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that AD7899BR-1REEL7 meets industry standards.
7.What is the process for return or replacement of AD7899BR-1REEL7?
All AD7899BR-1REEL7 units undergo pre-shipment inspection (PSI). If there is an issue with AD7899BR-1REEL7, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The AD7899BR-1REEL7 part is unused and in its original packaging.
Return procedure for AD7899BR-1REEL7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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